Results 31 to 40 of about 11,364,385 (285)

Wigner-Ville Distribution Associated with the Linear Canonical Transform

open access: yesJournal of Applied Mathematics, 2012
The linear canonical transform is shown to be one of the most powerful tools for nonstationary signal processing. Based on the properties of the linear canonical transform and the classical Wigner-Ville transform, this paper investigates the Wigner-Ville
Rui-Feng Bai   +2 more
doaj   +1 more source

Application research on the time–frequency analysis method in the quality detection of ultrasonic wire bonding

open access: yesInternational Journal of Distributed Sensor Networks, 2021
Imperfection in a bonding point can affect the quality of an entire integrated circuit. Therefore, a time–frequency analysis method was proposed to detect and identify fault bonds.
Wuwei Feng   +3 more
doaj   +1 more source

Wigner quasi-probability distribution of a resonator coherent field interacting with a flux qubit via two-photon coupling

open access: yesResults in Physics, 2023
The Wigner quasi-probability distribution function is an important tool for estimating the quantumness of quantum states. The Wigner distribution function (WDF) is related monotonically to the coherent field state density operator and their probability ...
Laila A. Al-essa   +4 more
doaj   +1 more source

Statistical Study of the Entanglement for Qubit Interacting with an Electromagnetic Field

open access: yesAdvances in Mathematical Physics, 2021
A statistical method is applied to predict the behaviour of a quantum model consisting of a qubit interacting with a single-mode cavity field. The qubit is prepared in excited state while the field starts from the binomial distribution state.
Neveen Sayed-Ahmed   +6 more
doaj   +1 more source

Pseudo affine Wigner distributions [PDF]

open access: yes1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings, 2002
We define a new set of tools for time-varying spectral analysis: the pseudo affine Wigner distributions. Based on the affine Wigner distributions of J. and P. Bertrand (1992), these new time-frequency distributions support efficient online operation at the same computational cost as the continuous wavelet transform. Moreover, they take advantage of the
Paulo Gonçalves, Richard G. Baraniuk
openaire   +2 more sources

Post-Earthquake Damage Identification of Buildings with LMSST

open access: yesBuildings, 2023
The structure is said to be damaged if there is a permanent shift in the post-event natural frequency of a structure as compared with the pre-event frequency. To assess the damage to the structure, a time-frequency approach that can capture the pre-event
Roshan Kumar   +2 more
doaj   +1 more source

Beyond Directions: Symmetry-Aware Rotation Sets for Triaxial Diffusion Encoding by Geometric Filter Optimization. [PDF]

open access: yesMagn Reson Med
ABSTRACT Purpose To improve the accuracy of diffusion‐weighted powder average signals for diffusion encoding with arbitrary b‐tensors. Methods We identify an intrinsic dihedral (D2) symmetry of diffusion signals for arbitrary diffusion encoding, which defines their natural signal space (a quotient of 3D rotations). Based on this, we propose a method to
Jespersen SN, Szczepankiewicz F.
europepmc   +2 more sources

Diesel injector dynamic modelling and estimation of injection parameters from impact response part 2: prediction of injection parameters from monitored vibration [PDF]

open access: yes, 1996
Part 2 of this paper presents the experimental and analytical procedures used in the estimation of injection parameters from monitored vibration. The mechanical and flow‐induced sources of vibration in a fuel injector are detailed and the features of the
Gu, Fengshou, Rao, K K, Ball, Andrew
core   +1 more source

X‐ray magnetic circular dichroism

open access: yesMajor Reference Works, Page 508-515., 2022
International Tables for Crystallography is the definitive resource and reference work for crystallography and structural science.

Each of the eight volumes in the series contains articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the ...
Gerrit van der Laan C. Chantler   +2 more
wiley  

+1 more source

Robust and fast algorithm for extracting the periodic feature from jet engine modulation signals

open access: yesThe Journal of Engineering, 2019
Jet engine modulation (JEM), a modulation phenomenon induced by the rotating structure of jet engines, is a representative feature extracted from the radar returns for aircraft target recognition.
Jingming Sun, Junpeng Yu
doaj   +1 more source

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